“It hasn’t been where we want to be as a region,” said the former Wales hooker.

“The players have had a chat among themselves and taken ownership for everything.

“We feel as we have let everyone down really.

"It’s hard to say what has been missing."

The Dragons will return to the European second tier tournament this weekend in a tournament they have excelled in during the last couple of campaigns having reached the semi-final last season by defeating the Cardiff Blues in the last eight.

When asked about their much improved Challenge Cup, Thomas replied: “I’m not too sure why that is.

“There is a special feeling about European rugby.

“There is less pressure maybe and we play a more expansive game for whatever reason but our game plan is normally very similar to when we play in the Guinness Pro12.